【Rare】Out-of-print item Purchased around 1990. Operation confirmed. No case, only the main unit. 【High-Quality Sound Adjustment】 The BOSS PQ-3B is a parametric equalizer for fine-tuning the sound quality of bass guitars. It excels in adjusting the low frequencies, allowing for sound making tailored to your playing style. 【Durable Design】 The metal case provides robustness to withstand live performances and studio use. It is designed to last for a long time. 【Wide Power Supply Compatibility】 Compatible with a wide range of power supplies from 100V to 240V, allowing for use both domestically and internationally. - Model: PQ-3B - Brand: BOSS - Type: Bass Parametric Equalizer - Power Requirements: AC Adapter (100V-240V) - Construction: Metal Case Thank you for viewing.